﻿using System;
using System.Collections.Generic;
using System.Web.UI;
using Xpedite.Localization;

/* Copyright (c) 2010 CBaxter
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 
 * IN THE SOFTWARE. 
 */

namespace Xpedite.Resources.Definitions
{
  internal interface IResourceDefinition
  {
    IEnumerable<INamedValue<IResourceContainer>> References { get; }
    IEnumerable<IResourceContainer> Resources { get; }
    ResourceType ResourceType { get; }
    String ReferenceName { get; }

    void EmitResource(HtmlTextWriter writer);
    IResourceContainer GetResource(String referenceName);
    void ReferenceResource(INamedValue<IResourceUrl> resources);
    void ReferenceResources(IEnumerable<INamedValue<IResourceUrl>> resources);
  }

  internal interface IResourceDefinitionFactory
  {
    IResourceDefinition Create(ResourceType type, String referenceName);
  }

  internal class ResourceDefinitionFactory : IResourceDefinitionFactory
  {
    private readonly DefinitionArgs _args;

    public ResourceDefinitionFactory(DefinitionArgs args)
    {
      Verify.NotNull(args, "args");

      _args = args;
    }

    public IResourceDefinition Create(ResourceType type, String referenceName)
    {
      switch (type)
      {
        case ResourceType.Css:
          return new CssDefinition(_args, referenceName);
        case ResourceType.JavaScript:
          return new JavaScriptDefinition(_args, referenceName);
        case ResourceType.Gif: //TODO: Will require special combiner to handle transparent background
        case ResourceType.Jpeg:
        case ResourceType.Png:
          return new SpriteDefinition(_args, referenceName, type); 
        default:
          throw new XpediteException(String.Format(ExceptionMessages.ResourceTypeExpected, referenceName));
      }
    }
  }
}
